Optimal frequency deviations control in microgrid interconnected systems. Issue 13 (25th July 2019)

• Record Type: Journal Article
• Authors: Siti, Mukwanga W.; Tungadio, Diambomba H.; Sun, Yanxia; Mbungu, Nsilulu T.; Tiako, Remy
• Is Part Of: IET renewable power generation. Volume 13:Issue 13(2019)
• Page Start: 2376
• Page End: 2382
• Publication Date: 2019-07-25
• Subjects: renewable energy sources -- power system interconnection -- load regulation -- optimal control -- synchronous generators -- distributed power generation -- frequency control -- power generation control -- energy storage -- power system control; optimal frequency deviations -- microgrid interconnected systems -- fossil fuel -- rarity -- emissions -- renewable energy source -- RES -- economic management -- study analyses -- conventional power sources -- renewable energy system -- frequency deviation -- area control error -- tie‐line power error -- power balance -- generation -- conventional source -- control application -- active power -- load frequency control -- integral part -- optimal control model -- energy storage system; Renewable energy sources -- Periodicals; 333.79405
• DOI: 10.1049/iet-rpg.2018.5801
• Languages: English
• ISSNs: 1752-1416

Abstract

Abstract : The increase in the price of fossil fuel due to its rarity and emissions means more integration of renewable energy sources (RESs) is required to improve economic management of the grid. This study analyses a combination of the tie‐line power between conventional power sources and the renewable energy system and its frequency deviations which are known as area control error. The minimisation of the tie‐line by optimal control is affected in such a way that the frequency and tie‐line power error can be minimised while maintaining the power balance between generation and load. The tie‐line connected to the microgrid consists of two main parts, namely the conventional source and the renewable energy source, each made up of a synchronous generator. The control application of the active power and frequency to a network is referred to as load frequency control (LFC) with the storage system as an integral part of RES. The simulation results show the performance of the proposed optimal control model in microgrid during the changing loads' condition, where the energy storage system applied to optimal control has shown a quick response to frequency deviation, which is close to 80%.